-- MUX_4 Entity
-- Chang Lan, <changlan9@gmail.com>
-- 11/9/2011

library IEEE;
use IEEE.std_logic_1164.all;
use IEEE.numeric_std.all;
-- load def
use work.global_definition.all;

entity mux4 is
    port (
        a, b, c, d : in std_ulogic_vector(width-1 downto 0);
        op         : in std_ulogic_vector(1 downto 0);

        output : out std_ulogic_vector(width-1 downto 0)
        );
end mux4;
